<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Ramsey\Uuid\Uuid;

class Order extends Model
{
    //退款状态
    const REFUND_STATUS_PENDING = 'pending';
    const REFUND_STATUS_APPLIED = 'applied';
    const REFUND_STATUS_PROCESSING = 'processing';
    const REFUND_STATUS_SUCCESS = 'success';
    const REFUND_STATUS_FAILED = 'failed';

    //物流状态
    const SHIP_STATUS_PENDING = 'pending';
    const SHIP_STATUS_DELIVERED = 'delivered';
    const SHIP_STATUS_RECEIVED = 'received';

    //退款数组
    public static $refundStatusMap = [
        self::REFUND_STATUS_PENDING => '未退款',
        self::REFUND_STATUS_APPLIED => '已申请退款',
        self::REFUND_STATUS_PROCESSING => '退款中',
        self::REFUND_STATUS_SUCCESS => '退款成功',
        self::REFUND_STATUS_FAILED => '退款失败',
    ];

    //物流数组
    public static $shipStatusMap = [
        self::SHIP_STATUS_PENDING => '未发货',
        self::SHIP_STATUS_DELIVERED => '已发货',
        self::SHIP_STATUS_RECEIVED => '已收货',
    ];

    protected $fillable = [
        'no',
        'address',
        'total_amount',
        'remark',
        'paid_at',
        'payment_method',
        'payment_no',
        'refund_status',
        'refund_no',
        'closed',
        'reviewed',
        'ship_status',
        'ship_data',
        'extra',
    ];

    protected $casts = [
        'closed' => 'boolean',
        'reviewed' => 'boolean',
        'address' => 'json',
        'ship_data' => 'json',
        'extra' => 'json',
    ];

    protected $dates = [
        'paid_at',
    ];

//boot() 方法中注册了一个模型创建事件监听函数，用于自动生成订单的流水号。
    protected static function boot()
    {
        parent::boot();

        //监听模型事件,在写入数据库之前触发

        static::creating(function ($model){
            //如果模型 no 字段为空
            $model->no = static::findAvailableNo();
            //如果生成失败 ,则终止创建订单
            if (!$model->no){
                return false;
            }
        });

    }

    public function user()
    {
        return  $this->belongsTo(User::class);
    }

    public function items()
    {
        return $this->hasMany(OrderItem::class);
    }

    public static function findAvailableNo()
    {
        //订单流水前缀
        $prefix = date('YmdHis');
         for ($i = 0; $i < 10 ; $i++){
             //随机生成6位随机数
             $no = $prefix.str_pad(random_int(0,999999),6,'0',STR_PAD_LEFT);

             //判断是否存在
             if(!static::query()->where('no', $no)->exists()){
                 return $no;
             }

         }

       \Log::warning('find order no faild');

         return false;
    }

    //生成退款单号
    public static function getAvailableRefundNo()
    {
        do {
            // Uuid类可以用来生成大概率不重复的字符串
            $no = Uuid::uuid4()->getHex();
            // 为了避免重复我们在生成之后在数据库中查询看看是否已经存在相同的退款订单号
        } while (self::query()->where('refund_no', $no)->exists());

        return $no;
    }

    //关联优惠劵
    public function couponCode()
    {
        return $this->belongsTo(CouponCode::class);
    }
}
